The very first members of the breed arrived with Norse settlers  around 900 A.D.  Since 982 A.D. laws have been in-place to prohibit any importation of other horse breeds into the country.  Consequently, it is one of the purest horse breeds in the world.  They have a short but sturdy stature that is well suited to their environment.  They are generally spirited but with a gentle temperament.  Given they have never had any predators in their natural environment, they are not easily spooked, making them very approachable and friendly.